09-01-15 108-C-215 CRITICAL PATH METHOD SCHEDULE (Revised 05-21-15) The Standard Specifications are revised as follows: SECTION 108, AFTER LINE 245, INSERT AS FOLLOWS: 108.04.1 Critical Path Method Schedule (a) General Requirements The Contractor shall provide a project schedule using the critical path method, CPM, in place of the bar graph type schedule required in accordance with 108.04. In addition to the submittals required herein, the CPM schedule shall be used to develop all schedules provided by the Contractor at scheduling meetings held in accordance with 108.04. The CPM schedule shall show the various activities of work in sufficient detail to demonstrate a reasonable and workable plan to complete the work in the specified contract time. The Contractor shall be responsible for ensuring that all work sequences are logical and that the schedule reflects a coordinated plan. The CPM schedule shall indicate the order and interdependence of activities and the sequence for accomplishing the work. The CPM schedule shall include sufficient detail to allow the Engineer to readily identify the work and evaluate the progress of each activity. The CPM schedule shall include activities for all work to be performed by the Contractor and subcontractors. The schedule shall also include activities specific to the project to be performed by the Department, other units of government, regulatory agencies, utilities and any other parties necessary to complete the work. The schedule shall reflect the scope of work, construction phasing, maintenance of traffic requirements, environmental requirements, utility and railroad coordination, coordination with other contractors, and any other work included in the contract. The schedule shall include activities for working and shop drawing preparation, Contractor submittals, submittal review time by the Engineer, material procurement and fabrication, and the delivery of materials, plant, and equipment and other similar activities. Failure by the Contractor to include any element of work or to accurately reflect the relationships among the work activities required for performance of the Contract does not excuse the Contractor from completing all required work within the specified time. (b) Definitions The following definitions shall be applied to the terms used in this specification and shall not be taken to modify in any way the definitions in 101.02 through 101.74. Activity – A discrete, identifiable task or operation that takes time, has a definable start and stop date, furthers the work’s progress, and can be used to plan, schedule, and monitor a project. 108-C-215 1 of 12 09-01-15 Activity Calendar – A set of days assigned to a specific activity on which work for the activity may be scheduled. Activity Calendar Day – A day on which work is scheduled to be performed on a specific activity. Activity Identification (ID) Number – A unique, alphanumeric identification code assigned to a specific activity. Activity Network Diagram – A graphic representation of a CPM schedule, including a timescale, which shows the relationships among activities. Bar Chart – A graphic representation of a schedule without relationship lines displayed. A timescale appears along the horizontal axis. Baseline CPM Schedule – An accepted CPM schedule showing the original plan to complete the entire project. Calendar ID – An alphanumeric identification code assigned to an activity calendar. Closure Period – The original or revised maximum duration specified in the contract for the closure of a road, ramp, bridge, or other facility. Constraint – A restriction imposed on the start or finish dates of an activity that modifies or overrides the activity’s logic relationships. Contract Completion Date – The original date or revised date specified in the contract for completion of the project. Controlling Activity – The first incomplete activity on the Critical Path. Critical Activity – Any activity on the critical path. Critical Path – The longest path of activities which determines the scheduled completion date of the project. Data Date – The first day in a baseline CPM schedule or the first day for performance of the remaining work in a monthly update CPM schedule. For a final CPM schedule, it is the date that the last activity was completed. Delayed Start Date – The original or revised date specified in the contract prior to which work on the project is prohibited. Final CPM Schedule – The last CPM schedule containing actual start and finish dates for every activity. 108-C-215 2 of 12 09-01-15 Free Float – The amount of time an activity can be delayed and not delay a successor. Incentive/Disincentive, I/D, Date – The original or revised date specified in the contract for completion of a specified portion of the project. Completion of the specified work prior to the I/D date may entitle the Contractor to additional compensation. Completion of the specified work after the I/D date may result in a credit to the Department. Intermediate Completion Date – The original or revised date specified in the contract for completion of an interim milestone, phase or other portion of the project. Milestone – An activity with no duration that is typically used to represent the beginning or end of the project or an interim phase. Includes, but is not limited to, intermediate completion dates and the contract completion date. Monthly Update CPM Schedule – A CPM schedule produced by incorporating the project’s actual progress into the baseline CPM schedule. Open End – The condition that exists when an activity has either no predecessor or no successor, or when an activity’s only predecessor relationship is a finish-to-finish or only successor relationship is a start-to- start. Original Duration – The estimated time, expressed in activity calendar days, required to perform an activity. Predecessor – An activity that is defined by schedule logic to precede another activity. A predecessor may control the start or finish date of its successor. Relationship – The interdependence among activities. Relationships link an activity to predecessors and successors. Remaining Duration – The estimated time, expressed in activity calendar days, required to complete an activity. Schedule – Activities organized by relationships to depict the plan for execution of a project. Scheduled Completion Date – The completion date forecast by the CPM schedule. The schedule may also forecast intermediate completion dates or durations for milestones, phases, or other portions of the project. Successor – An activity that is defined by schedule logic to succeed another activity. The start or finish date of a successor may be controlled by its predecessor. 108-C-215 3 of 12 09-01-15 Total Float – The amount of time an activity can be delayed and not delay the contract completion date. (c) Required CPM Schedule Submissions 1. Baseline CPM Schedule The baseline CPM schedule submittal shall consist of a CPM schedule in accordance with 108.04.1(d) and a narrative report in accordance with 108.04.1(e). The baseline CPM schedule data date shall be the date of the notice to proceed and the CPM shall not include any actual start or actual finish dates for any activity. The baseline CPM schedule submittal shall be made no later than the date of the preconstruction conference. If the Contractor fails to submit the baseline CPM schedule by the date of the preconstruction conference, the Department will withhold progress estimates until the baseline CPM schedule is submitted. 2. Monthly Update CPM Schedule The monthly update CPM schedule submittal shall consist of a CPM schedule in accordance with 108.04.1(d) and a narrative report in accordance with 108.04.1(e). The first monthly update CPM schedule shall be submitted by the 7th of the month following acceptance of the baseline CPM schedule. Each succeeding monthly update CPM schedule shall be submitted by the 7th of each succeeding month. The CPM schedule data date shall be the last date of the month prior to submittal. The CPM shall not include any actual start or actual finish dates later than the data date for any activity. If the 7th day of an individual month is a Saturday, Sunday, or a holiday on which work has been suspended, the monthly update CPM schedule shall be submitted by the first business day following the 7th. If the Contractor fails to submit a monthly update CPM schedule by the required date, the Department will withhold progress estimates until the monthly update CPM schedule submittal is made. 3. Final CPM Schedule The final CPM schedule shall consist of a CPM schedule in accordance with 108.04.1(d). The final CPM schedule shall be submitted no later than 30 calendar days after final acceptance. The final CPM schedule shall depict the actual start and finish dates for each activity. The data date of the final CPM schedule shall be the date of final acceptance. If the Contractor fails to submit the final CPM schedule by the required date, the Department will withhold progress estimates until the final CPM schedule is submitted. 4. Acceptance of Schedules The Engineer will provide written notice within 14 calendar days of receipt of a baseline, monthly update, or final CPM schedule that the schedule is either accepted or rejected. If the notice indicates that a schedule is rejected, the contractual basis for 108-C-215 4 of 12 09-01-15 rejection will be identified. If the Engineer does not respond in writing to the submittal of a schedule within the allotted time, the schedule shall be considered to be accepted. The Engineer’s written notice of acceptance or rejection may include questions, comments, or request additional information. The next CPM schedule submittal’s narrative report shall address all questions, comments, or additional information requested by the Engineer. Rejected baseline CPM schedules shall be resubmitted until accepted by the Engineer. If acceptance of a baseline CPM schedule is not obtained within 45 calendar days of the date of the preconstruction conference, the Department will withhold progress estimates until the baseline CPM schedule is accepted.